JP3672667B2 - Nail bending inspection device for the manufacture of gaming machines - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for inspecting the presence or absence of bending of game nails driven into a game board in a game machine production line by image processing.
[0002]
[Prior art]
A manufacturer that manufactures gaming machines such as pachinko machines is designed on one side of the gaming board by supplying a gaming board such as veneer cut into a substantially square size by a woodworking manufacturer to the gaming machine production line. Cell pasting process that unites the illustrated cell sheets together, multi-axis drilling process that cuts mounting holes such as reference holes and guide rails for positioning work in the post process, game nails and game functional parts Gauge press process that pushes the pilot hole for mounting holes, router process that cuts the opening for mounting game function parts, process for driving game nails, process for inspecting bent game nails, guide rails and game function parts The game board (gauge board) is manufactured through an assembly process for attaching the game machine, a process for inspecting whether or not the game function parts normally operate.
[0003]
A conventional nail bending inspection apparatus in a game machine manufacturing line is a game nail in which light emitted from a light source such as a fluorescent lamp is driven into a game board as disclosed in, for example, Japanese Patent Laid-Open No. 6-238040. Irradiate from above and reflect the irradiated light at the head of the game nail, capture the reflected image formed on the head with a video camera from above, and compare the imaged head position with the reference position Then, the bending of the game nail is discriminated, the defective product is discharged out of the production line, and the non-defective product is passed to the next process.
[0004]
[Problems to be solved by the invention]
However, in the conventional nail bending inspection apparatus, the inspection area is not formed in the dark room, the light emitting surface of the light source is installed substantially vertically upward in front of the transport direction of the game board, and the image sensor is connected to the light source from the light source. It is easy to pick up the irradiation light directly, and it is difficult for the image sensor to capture a reflection image formed on the bent portion of the game nail. For this reason, in order to make it easy to capture the reflected image of the bent portion, when the light emission amount of the light source or the aperture of the imaging means is increased, the cell sheet on which the design element is drawn is integrally coupled to the surface of the game board of the game board The reflection image from the camera is picked up and inspection becomes impossible.
[0005]
In view of this, the present invention forms an inspection area in a dark box and shields it from external light that maintains the surrounding work environment, and directs the light from the light source with the light emitting surface of the light source obliquely directed to the board surface of the game board on which the game nail is driven. Is applied to the game nail obliquely from above to increase the brightness of the reflected image at the head and the bent part, and the imaging element is arranged above the irradiation area from the light source so that the reflected image from the cell sheet is not picked up. Furthermore, an object of the present invention is to provide a nail bending inspection apparatus for manufacturing a gaming machine that can accurately determine whether or not a game nail is bent.
[0006]
[Means for Solving the Problems]
The nail bending inspection apparatus for manufacturing a gaming machine according to the present invention is orthogonal to the transport direction of the game board for transporting the game board in which the game nail is driven in one direction with the game nail driven into the game board facing upward. A pair of left and right conveyors that face each other in a direction, a dark box that is arranged above the pair of left and right conveyors to form an inspection area that is shielded from external light that maintains the surrounding work environment, and a pair of left and right conveyors inside the dark box an intermittent feed mechanism for transporting the implanted game board of conveyed game nail inspectable posture inside the dark box, an intermittent feed mechanism is provided above the side a and a pair of right and left conveyors after the interior of the dark box Game board game by illuminating a number of game nails on the game board transported so as to be inspected obliquely from above, and by irradiating from the light source placed in the dark box above the irradiation area from the light source Nail An image pickup device that picks up the reflection image at the head and the bent portion from above the head of the game nail, and a discriminating means that compares the image pickup position data picked up by the image pickup device with reference data to determine whether or not the game nail is bent And the light source is attached so as to be able to adjust the inclination angle and height of the game board that has been raised to a predetermined inspection height with a lift base inside the dark box with respect to the board surface on which the game nail is driven, The intermittent feed mechanism is regulated by a stopper that moves so that the game board on which the game nails carried by the pair of left and right conveyors are driven enters the inside of the dark box, and is moved so as to retract after restricting the conveyance of the game board. The game board is lifted and supported from one left and right conveyor between a pair of left and right conveyors and lifted to a predetermined inspection height, and the game board lifted to a predetermined inspection height is used as an image sensor. A lift base that moves up and down so as to be delivered to the conveyor after imaging, a stopper and a lift base are mounted, and the pair of left and right conveyors are moved in the same direction and in the opposite direction of the transport direction of the game board and in the transport direction of the game board A movable base intermittently fed in the same direction, and the imaging element picks up an image of the game nail in the game board raised to a predetermined inspection height by the lift base while the movable base moves in the same direction It is characterized by being. According to the nail bending inspection device for manufacturing a gaming machine according to the present invention, the transport of the game board into which the game nail transported by the conveyor is driven is performed in a predetermined area in the inspection area shielded from the external light that maintains the surrounding work environment. The game board in which the game nail regulated in this predetermined position is driven is lifted from the conveyor to a predetermined inspection height, and the light from the light source is turned to the game nail in the game board lifted to the predetermined inspection height. Irradiate from diagonally upward to increase the brightness of the reflected image at the head and bent portions of the game nail, and arrange the image sensor above the irradiation area from the light source to reduce the light emission amount of the light source and the aperture of the imaging means. Without picking up the reflection image from the cell sheet, it accurately captures both the reflection image at the head of the game nail and the reflection image at the bent portion, and accurately determines whether the game nail is bent or not To improve production efficiency Can. Moreover, since the light source is mounted so that the inclination angle and height of the game board lifted to the predetermined inspection height by the lift base with respect to the board surface on which the game nail is driven can be adjusted inside the dark box, It is possible to suitably maintain the inclination angle and height at which the game nails in the game board raised to a predetermined inspection height are irradiated obliquely from above. In addition, the intermittent feeding mechanism includes a stopper and a stopper that move so that the game board on which the game nails carried by a pair of left and right conveyors are driven enters the inside of the dark box and then retreats after restricting the conveyance of the game board. The restricted game board is lifted and supported from one left and right conveyor between a pair of left and right conveyors and lifted to a predetermined inspection height, and the game board lifted to a predetermined inspection height is delivered to the conveyor after imaging by the imaging device A lift base that moves up and down, a stopper, and a lift base, which are moved in the same direction and in the opposite direction of the game board transfer direction by a pair of left and right conveyors, and are intermittently fed in the same direction of the game board transfer direction Since the image sensor is lifted to a predetermined inspection height by the lift base, the game nail is imaged on the game board. In While in a pair of right and left conveyors can be left carrying a board game that is driven with the gaming nails is the next test object to a position in front of the dark box, you are possible to efficiently perform inspection. In the nail bending inspection apparatus for manufacturing a gaming machine according to the present invention, if a light-transmitting opaque plate is provided on the front surface of the light source to form a light emitting surface for diffusing the light of the light source to expand the irradiation field, The light of the light source can irradiate many game nails appropriately. In the nail bending inspection apparatus for manufacturing a gaming machine according to the present invention, if an anti-reflection curtain such as black felt is provided inside the dark box, the reflected light irradiated from the light source and reflected by the game board is reflected on the inner surface of the dark box. Can be prevented from being reflected. In the nail bending inspection apparatus for manufacturing a gaming machine according to the present invention, if the light-shielding plate is attached to the lower part of the front wall lower part and the rear wall lower part of the dark box so as not to interfere with the conveyor, the external light maintaining the surrounding work environment Can be prevented from entering the inside of the dark box from around the conveyor. In the nail bending inspection apparatus for manufacturing a gaming machine according to the present invention, if the conveyor includes a roller for transporting a game board in which game nails are driven at a speed that is faster than the transport speed of the conveyor, a game from the outside to the inside of the dark box The board transport time and the game board transport time from the inside of the dark box to the outside are shortened, and the shortened time can be used as the inspection time.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show a first embodiment. 1 and 2, a pair of endless left and right chain conveyors 4 wound around front and rear sprockets 2 and 3 provided outside the dark box 1 so as to reverse the moving direction are The game board 6 discharged from the process and in which a large number of game nails 5 are driven is transported in the transport direction X from the sprocket 2 side toward the sprocket 3 side, and the game board 6 enters the inside of the dark box 1 and is regulated by the stopper 7. Then, the intermittent feeding mechanism 8 lifts the game board 6 to a predetermined inspection height from the chain conveyor 4 and intermittently feeds it, and a plurality of fluorescent lamps 9b in which the light emitting surface 9a is directed obliquely to the board surface of the game board 6. The light n from the light source 9 having the above is irradiated to the game nail 5 obliquely from above, and is formed in a circular shape with a size that is a fraction of the whole head of the game nail 5 on the transport direction X side of the head of the game nail 5 High brightness reflected image, bent and hit A high-brightness reflected image formed in a vertically long shape with a size that is a fraction of the entire shaft portion of the game nail 5 on the conveyance direction X side of the bent portion of the inserted game nail 5 is a direction orthogonal to the conveyance direction X Images are taken from above for each predetermined region while the feeding operation of the intermittent feeding mechanism 8 is stopped by a plurality of imaging devices 10 such as a CCD camera, a video camera, and an industrial camera arranged so as to have an inspection visual field crossing Y. Then, the control device incorporating the discriminating means having the computer (not shown) that has received the imaging signal compares each imaging position data with the reference data stored in the storage unit of the control device, and whether or not the game nail 5 is bent Then, it is determined whether the nail interval is good or not, and whether there is a nail at the position where it should be.
[0008]
The dark box 1 forms an inspection area that is shielded from external light such as light emitted from an indoor lamp and direct sunlight that maintains the surrounding work environment, and is located above a frame 11 disposed on the left and right outer sides of the middle part of the chain conveyor 4. Further, the Dharma-shaped hole 12 formed on the side wall of the dark box 1 is attached by engaging with a protrusion 13 protruding from the outer surface of the frame 11. A black felt-like anti-reflection curtain 14 is stretched inside the dark box 1, and the anti-reflection curtain 14 reflects the reflected light emitted from the light source 9 and reflected by the game board 6 on the inner surface of the dark box 1. Is prevented. The light shielding plate 15 is separated from the lower portion of the front wall and the rear wall of the dark box 1 so as not to interfere with the chain conveyor 4, and a Dalma-shaped hole 16 formed in the light shielding plate 15 is provided in the frame 11. It is attached by engaging with a protrusion 17 protruding from the outer surface. The shading plate 15 prevents the extraneous light that maintains the surrounding work environment from entering the inside of the dark box 1 from around the chain conveyor 4, and the black matte coating is applied to the inner surface of the synthetic resin plate such as acrylic. Is given.
[0009]
As shown in FIG. 3, each chain conveyor 4 rotatably supports the center roller 19 and the left and right rollers 20 with pins 21 connecting the chain plates 18 between them. When the chain conveyor 4 moves in the transport direction X, the left and right rollers 20 slide in contact with the upper surface of the guide rail 22 laid on the inside and outside of the dark box 1 and rotate, so that the central roller 19 is in contact with the left and right rollers 20. By passing through the groove 23 of the guide rail 22 in a non-contact manner while rotating integrally in the same direction by friction between the contact surfaces, the game board 6 mounted with the central roller 19 is moved from the transport speed V1 of the chain conveyor 4. Is also transported at a fast double speed V2 (V1 <V2).
[0010]
As shown in FIG. 1, the intermittent feed mechanism 8 has a mechanism base 24 attached to the frame 11 below the internal space of the pair of left and right chain conveyors 4, and a screw mechanism (not shown) is mounted on the mechanism base 24. A movable base 25 that is intermittently fed by a predetermined amount of driving of a feed mechanism such as the above is provided, and a stopper 7 and a lift base 26 are provided on the movable base 25. The stopper 7 moves upward from the upper conveying portion of the chain conveyor 4 by the expansion and contraction of the piston rod of the stopper elevating cylinder 27 attached to the movable base 25, and the upper limit position that restricts the conveyance of the game board 6 by the chain conveyor 4. In addition, it is connected to the stopper raising / lowering cylinder 27 so as to move down to the lower limit position that allows the game board 6 to be conveyed by the chain conveyor 4 by lowering from the upper conveying section of the chain conveyor 4. The lift base 26 is lifted upward from the upper conveying portion of the chain conveyor 4 by the expansion and contraction of the piston rod of the base lifting cylinder 28 attached to the movable base 25, and the game board 6 regulated by the stopper 7 is levitated from the chain conveyor 4. It is connected to the base elevating cylinder 28 so as to move up and down to a supported upper limit position and a lower limit position where the game board 6 is transferred to the chain conveyor 4 by being lowered below the upper conveyor of the chain conveyor 4. .
[0011]
The lift base 26 is slidably engaged with a guide pole 29 erected on the movable base 25 so as to be lifted and lowered without swinging, and when the game board 6 reaching a predetermined position is lifted and lifted. The game board 6 is positioned by fitting a reference pin 30 provided in itself into a reference hole (not shown) of the game board 6, and in this state, the game board 6 is moved in the same direction as the transport direction X. Are intermittently fed four times, and the entire area of the game board 6 is passed through the inspection visual field in four stages.
[0012]
The light source 9 diffuses the light L of the fluorescent lamp 9b by a light-transmitting opaque plate that forms a light emitting surface 9a such as a smoked acrylic plate or polished glass installed in front of the fluorescent lamp 9b. The irradiation field is expanded.
[0013]
The light source 9 is erected from the frame 11 inside the dark box 1 with a support member 31 having a long hole 32 formed in the support member 31, a long hole 33 formed in the light source 9, and a bolt / nut 34. And it is attached so that the height can be adjusted.
[0014]
The imaging element 10 is disposed above the irradiation area from the light source 9 inside the dark box 1 and is erected from the frame 11 and attached to the support member 35 so that it can be adjusted vertically, horizontally, and back and forth.
[0015]
According to the structure of this embodiment, the game board 6 in which the nailing process has been completed is transported in the transport direction X at the double speed V2 and with low vibration by the pair of left and right chain conveyors 4 having the rollers 19 and 20, and the dark box 1 Since the time required for transporting the game board 6 from the nail driving process to the inspection process is shortened, the reduced time is used as the inspection time, and the nail is completed at the rate of one unit every few seconds. The bending inspection process can be assembled to be continuous.
[0016]
The game board 6 entering the inside of the dark box 1 comes into contact with the stopper 7 raised to the upper limit position. As a reaction, the central roller 19 in contact with the game board 6 resists contact friction with the left and right rollers 20. By rotating in the opposite direction, the back of the game board 6 controlled by the stopper 7 rolls without the center roller 19 rubbing, and the back of the game board 6 is prevented from being scratched by the rollers. it can.
[0017]
By detecting a game board 6 in contact with the stopper 7 by a sensor (not shown), the lift base 26 of the intermittent feed mechanism 8 starts to rise from the lower limit position to the upper limit position due to the extension of the base lifting cylinder 28. Thus, the reference pin 30 of the lift base 26 enters the reference hole of the game board 6, and the game board 6 is positioned and mounted on the lift base 26 and supported by the chain conveyor 4. After the game board 6 is positioned and mounted on the lift base 26, the stopper 7 stops from the ascending limit position to the descending limit position due to the reduction of the stopper elevating cylinder 27.
[0018]
Then, when the lift base 26 stops at the upper limit position, the game board 6 is raised to a predetermined inspection height, and the light L emitted from the light source 9 is irradiated to the game board 6 obliquely from above. Since the light source 9 requires a predetermined stabilization time from the start of power supply until the light emission operation is stabilized, such as a fluorescent lamp 9b, the light source 9 does not turn off the power each time one game board 6 is inspected. The fluorescent lamp 9b is kept on from just before the start of the morning until the end of the evening. In addition, when the fluorescent lamp 9b is turned off during the lunch break to reduce power consumption, the power to the fluorescent lamp 9b immediately before the start of the afternoon work is taken into account in the afternoon work, taking into account the time during which the light emission operation of the fluorescent lamp 9b is stabilized. If it supplies, the work of the afternoon can be performed smoothly.
[0019]
At the initial position where the game board 6 is lifted to a predetermined inspection height, the imaging operation of the image sensor 10 is started, and the imaging position data in the first inspection visual field is collated with the reference data by a control device (not shown). Then, it is determined whether or not the game nail 5 is bent. In this determination, the ratio at which the reflected image of the head is located in a reference area such as a circle or a rectangle indicating a certain allowable range as reference data, for example, the reflected image of the head is entirely or half or more inside the reference area. If it is located, the position of the head of the game nail 5 is normal, and if the reflection image of the head does not exist at all within the reference area or less than half, the game nail 5 is bent and the head Or the game nail 5 is broken and does not exist. On the other hand, if the reflection image of the bent portion exists outside the reference region, the game nail 5 is bent and driven and it is defective. If at least one non-determined result indicating the defective portion exists in the inspection visual field, the non-determined result associated with the imaging position data indicating the defective portion is stored in the storage unit. If a shape such as a circle or a square representing the reference region is set to have a similar shape to a reflection image as an inspection object and a larger area than the reflection image, the inspection accuracy is improved.
[0020]
Thereafter, the movable base 25 is stopped by moving one frame to the light source 9 side, the imaging position data is taken in the inspection visual field in the second stage, the quality of the imaging position data is judged, the judgment result is judged to be stored in the storage unit. After the storage, the movable base 25 is further moved and stopped by one frame toward the light source 9 to acquire the imaging position data in the inspection visual field in the third stage, the pass / fail judgment of the imaging position data, the judgment result judgment result After storing the data in the storage unit, the movable base 25 is moved to the light source 9 side by one frame and stopped to obtain the imaging position data in the inspection visual field in the fourth stage, whether the imaging position data is good or bad, The pass / fail judgment is performed for each inspection visual field by storing the reject judgment result in the storage unit.
[0021]
When the inspection of the entire inspection field is completed, the game board 6 is received by the chain conveyor 4 and the lift base 26 in the process in which the lift base 26 stops from the ascending limit position to the descending limit position due to the reduction of the base elevating cylinder 28. The positioning pin 30 is removed from the reference hole of the game board 6, and the game board 6 is conveyed downstream from the dark box 1 by the conveying operation of the chain conveyor 4.
[0022]
If at least one defect determination area exists as a result of the pass / fail determination, when the gaming board 6 that has been inspected is transported to the downstream side of the dark box 1, the control device operates a rejecter (not shown) to play the gaming board. 6 is discharged to a correction stage provided outside the chain conveyor 4, and the inspection data, which is a determination result associated with the imaging position data, is printed out.
[0023]
At this correction stage, the operator corrects the bend and nail interval of the game nail 5 according to the defect information while viewing the inspection data printed out. For example, because the head position is different, if the nail spacing is bad, the head of the game nail 5 is struck from a diagonal direction with a hammer, and if it is bent, the bent game nail 5 is pulled out and a new normal game is played. The nail 5 is struck with a hammer, and a new normal game nail 5 is struck with a hammer based on a pilot hole (gauge-pressed hole) in a place without a nail. After correction, the game board 6 is connected to the chain conveyor 4 on the downstream side of the rejector. Or return to the chain conveyor 4 on the upstream side of the dark box 1 for re-inspection.
[0024]
In short, according to this embodiment, the dark box 1 forms an inspection area that is shielded from the external light that maintains the surrounding work environment, and the pair of left and right chain conveyors 4 has a large number of game nails 5 at the end of the nail driving process. The struck game board 6 is carried into the inspection area inside the dark box 1, and the light emitting surface 9 a of the light source 9 is obliquely directed to the board surface of the game board 6 in which the game nail 5 is driven in the inspection area. By irradiating the game nail 5 with the light L obliquely from above, the brightness of the reflected image at the head and the bent portion is increased without increasing the light emission amount of the light source 9 and the aperture of the image sensor 10, and the image sensor 10 is Arranged above the irradiation area from the light source 9, without picking up the reflection image from the cell sheet, automatically check whether the game nail 5 is bent, whether the nail spacing is good, whether there is a nail at the position where it should be It can be determined accurately.
[0025]
FIG. 4 shows the second embodiment. Since the bend of the game nail 5 is not always in one direction, a plurality of light sources 9 having the same light emission amount are arranged before and after the image sensor 10 in the transport direction X of the game board 6. The game nail 5 can be inspected at a time both when the game nail 5 is bent to the inclined side and when it is bent to the opposite side.
[0026]
Further, as shown by phantom lines in FIG. 4, by providing the light source 9 having the same light emission amount as the plurality of light sources 9 on the side where the game nail 5 is bent in the nail driving process, the game nail 5 is moved sideways. Even when bent, it can be inspected at once.
[0027]
Although not shown, on the upstream side of the dark box 1, identification information such as a bar code for specifying the model of the game board 6 displayed on the game board 6 is optically or magnetically read and read. If the model name is the same as the immediately preceding model name, the reference data is not replaced in the storage unit, and the reference data is replaced if they are different. In the case of a new model in which the reference data does not exist in the storage unit at the time of data exchange, the imaging position data indicating the head position of the game nail 5 of the game board 6 that flows first to the chain conveyor 4 is taught, and the teaching data is It is also possible to apply to the storage unit as reference data. In this teaching, the game board 6 to be flown to the chain conveyor 4 is first removed from the line after the nailing process by an operator, and the nail interval and bending are checked. The game board 6 is transferred to the correction stage by bypassing the inspection device. When a good game board 6 is obtained by maintenance inspection of the nailing machine, it is a matter of course that the first game board 6 is placed on the chain conveyor 4 as the first game board 6 and is flowed to the inspection device for teaching.
[0028]
In addition to creating the reference data by teaching using the game board 6 after nailing, the head position is automatically determined based on the nailing position data similar to that used for the nailing machine. It is also possible.
[0029]
In addition, since the bending of the nail is not always in one direction, either one or both of the light source 9 and the image sensor 10 and the game board 6 are planarly oriented at a rotation angle of 90 degrees or 180 degrees. If the inspection is performed from a plurality of directions, the accuracy of the bending inspection can be improved.
[0030]
In the above-described embodiment, the example in which the inspection device is provided in the internal space of the chain conveyor 4 is illustrated and described. However, a lifter having a transport mechanism in the direction Y intersecting the transport direction X can be moved up and down in the internal space of the chain conveyor 4. A lifter in which an inspection device covered with the dark box 1 is provided outside the chain conveyor 4 in front of the transport direction Y by the lifter, and the game board 6 in which the nailing process is finished is at the lower limit position by the chain conveyor. After the lifter has lifted and supported the game board 6 from the chain conveyor 4 by stopping the transport operation of the chain conveyor 4 and raising the lifter from the lower limit position to the upper limit position, If the transport mechanism of the lifter is operated so that the game board 6 is transferred over the chain conveyor 4 onto the lift base 26 of the inspection device, it is out of the production line. It is also possible to carry out the inspection of bent nails.
[0031]
In FIG. 1 showing the above embodiment, the game nail 5 that has been successfully driven is illustrated as being perpendicular to the board surface of the game board 6, but in reality, the game nail 5 is attached to the game board 6. It is generally driven so as to incline about 5 ° toward the upper side installed on the island of the pachinko parlor.
[0032]
Also, if the parts that make up the chain conveyor 4 or other inspection devices reflect extraneous light and the reflected light enters the interior of the dark box 1, black matte coating or plating is applied. The region can be formed in a good dark room state.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view taken along line AA of FIG. 2 showing a first embodiment.
FIG. 2 is a perspective view showing the embodiment.
FIG. 3 shows a main part of the chain conveyor according to the embodiment, wherein a is a side view and b is a cross-sectional view.
FIG. 4 is a plan view showing a second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Dark box 4 Chain conveyor 5 Game nail 6 Game board 7 Stopper 8 Intermittent feed mechanism 9 Light source 9a Light emission surface 10 Image sensor

Claims (5)

A pair of left and right conveyors facing each other in a direction perpendicular to the direction of conveyance of the game board for conveying the game board in which the game nail is driven in one direction with the game nail driven into the game board facing upward, and a pair of left and right conveyors A dark box that is placed above the conveyor and forms an inspection area that is blocked by extraneous light that maintains the surrounding work environment, and a game board in which game nails carried by a pair of left and right conveyors are placed inside the dark box Intermittent feed mechanism that transports to a posture that can be inspected inside , and a large number of game nails on the game board that is provided behind the dark box and above the pair of left and right conveyors and transported so that it can be inspected by the intermittent feed mechanism A light source that irradiates light from obliquely above, and a reflection image at a head and a bent portion of the game nail of the game board that is disposed above the irradiation area from the light source and provided inside the dark box by the light source. Above the head of An imaging element for imaging Ri, and a discriminating means for discriminating the presence or absence of bending of the game nail imaging position data taken by the imaging device is compared with a reference data, the light source is predetermined inspection high lift base inside the dark box The game board lifted to the height of the game nail is attached so that the inclination angle and the height of the game nail can be adjusted, and the intermittent feed mechanism of the game nail conveyed by the pair of left and right conveyors When a game board that has been struck enters the inside of the dark box, a stopper that moves so as to retreat after restricting the transport of the game board, and a game board restricted by the stopper between a pair of left and right conveyors from one left and right conveyor The game board lifted to the predetermined inspection height is supported by levitating and lifted up and down so that the game board lifted to the predetermined inspection height is transferred to the conveyor after being imaged by the image sensor. And a movable base that is mounted with a stopper and a lift base and is moved in the same direction and in the opposite direction of the game board transfer direction by a pair of left and right conveyors and intermittently fed in the same direction of the game board transfer direction. A nail for manufacturing a gaming machine , wherein the image pickup device picks up an image of a game nail in a game board lifted to a predetermined inspection height by the lift base while the movable base moves in the same direction. Bending inspection device.   2. A nail for manufacturing a gaming machine according to claim 1, wherein a light-transmitting opaque plate is provided on the front surface of the light source to form a light emitting surface for diffusing light from the light source to expand an irradiation field. Bending inspection device.   2. The nail bending inspection apparatus for manufacturing a gaming machine according to claim 1, wherein an antireflection curtain such as black felt is stretched inside the dark box.   2. The nail bending inspection apparatus for manufacturing a gaming machine according to claim 1, wherein a shading plate is attached to the lower part of the front wall and the lower part of the dark box so as not to interfere with the conveyor.   2. The nail bending inspection apparatus for manufacturing a gaming machine according to claim 1, wherein the conveyor includes a roller for conveying a game board in which game nails are driven at a double speed faster than a conveying speed of the conveyor.

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